Granted Patent
Utility
US 5,089,429 · App. 07/370,413
Self-aligned emitter BiCMOS process
Inventor:
Sheng Teng Hsu
Patented Case
View Patent ↗
Granted: Feb 18, 1992
Filed: Jun 22, 1989
Inventor
Sheng Teng Hsu
Assignee (at issue)
David Sarnoff Research Center Inc.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.